/* GraphSlop — dark, slightly toxic academia */
:root {
  --bg: #0a0c10;
  --bg-elevated: #12151c;
  --bg-card: #161a24;
  --border: #2a3142;
  --text: #e8eaef;
  --text-muted: #8b95a8;
  --accent: #7ee787;
  --accent-dim: #4a9d52;
  --warning: #ffb020;
  --slop: #ff6b9d;
  --font-sans: "Space Grotesk", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, monospace;
  --radius: 12px;
  --shadow: 0 8px 32px rgba(0, 0, 0, 0.45);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-sans);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--text);
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 120% 80% at 50% -20%, rgba(126, 231, 135, 0.12), transparent 50%),
    radial-gradient(ellipse 60% 40% at 100% 50%, rgba(255, 107, 157, 0.06), transparent);
}

a {
  color: var(--accent);
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

a:hover {
  color: #9ef0a4;
}

.wrap {
  width: min(1100px, 92vw);
  margin: 0 auto;
  padding: 0 1rem;
}

/* Nav */
.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  padding: 0.75rem 0;
  background: rgba(10, 12, 16, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}

.site-nav .inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}

.logo {
  font-weight: 700;
  font-size: 1.15rem;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}

.logo span {
  color: var(--slop);
}

.nav-links {
  display: flex;
  gap: 1.25rem;
  flex-wrap: wrap;
  font-size: 0.9rem;
}

.nav-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--accent);
}

/* Hero */
.hero {
  padding: 4rem 0 3.5rem;
  text-align: center;
}

.hero-badge {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--warning);
  border: 1px solid rgba(255, 176, 32, 0.35);
  padding: 0.35rem 0.75rem;
  border-radius: 999px;
  margin-bottom: 1.25rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2.25rem, 6vw, 3.5rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero h1 .graph {
  color: var(--accent);
}

.hero h1 .slop {
  color: var(--slop);
  text-shadow: 0 0 40px rgba(255, 107, 157, 0.35);
}

.hero-lede {
  max-width: 36rem;
  margin: 0 auto 1.5rem;
  font-size: 1.2rem;
  color: var(--text-muted);
}

.hero-cta {
  display: inline-flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.btn {
  display: inline-block;
  padding: 0.65rem 1.25rem;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1px solid transparent;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent-dim), var(--accent));
  color: #0a0c10;
  box-shadow: 0 4px 20px rgba(126, 231, 135, 0.25);
}

.btn-primary:hover {
  color: #0a0c10;
}

.btn-ghost {
  border-color: var(--border);
  color: var(--text-muted);
  background: var(--bg-elevated);
}

.btn-ghost:hover {
  color: var(--text);
  border-color: var(--accent-dim);
}

/* Sections */
section {
  padding: 3rem 0;
}

section h2 {
  margin: 0 0 0.5rem;
  font-size: 1.75rem;
  letter-spacing: -0.02em;
}

.section-intro {
  margin: 0 0 1.75rem;
  color: var(--text-muted);
  max-width: 42rem;
}

/* Category grid */
.category-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1rem;
}

.category-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.35rem;
  box-shadow: var(--shadow);
}

.category-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--slop);
  line-height: 1.35;
}

.category-card p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--text-muted);
}

/* Slop of the day */
.sotd {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  padding: 1.75rem;
  box-shadow: var(--shadow);
}

.sotd-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1rem;
  flex-wrap: wrap;
}

.sotd-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--accent);
  border: 1px solid rgba(126, 231, 135, 0.4);
  padding: 0.25rem 0.6rem;
  border-radius: 6px;
}

.sotd h3 {
  margin: 0 0 0.5rem;
  font-size: 1.35rem;
}

.sotd-meta {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 1rem;
}

.sotd-meta code {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--bg);
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
}

.sotd-why {
  margin: 0;
  padding: 1rem;
  background: var(--bg);
  border-left: 3px solid var(--slop);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 0.98rem;
}

.sotd-why strong {
  color: var(--warning);
}

/* Feed */
.slop-feed {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.slop-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.35rem 1.5rem;
  transition: border-color 0.2s;
}

.slop-card:hover {
  border-color: rgba(126, 231, 135, 0.35);
}

.slop-card h3 {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
}

.slop-card .desc {
  margin: 0 0 0.75rem;
  color: var(--text-muted);
  font-size: 0.95rem;
}

.slop-card-footer {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1.25rem;
  font-size: 0.82rem;
  color: var(--text-muted);
}

.slop-card-footer a.source {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  word-break: break-all;
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  background: var(--bg);
  color: var(--slop);
  border: 1px solid var(--border);
}

details.slop-details {
  margin-top: 0.75rem;
}

details.slop-details summary {
  cursor: pointer;
  font-size: 0.88rem;
  color: var(--accent);
  list-style: none;
}

details.slop-details summary::-webkit-details-marker {
  display: none;
}

details.slop-details[open] summary {
  margin-bottom: 0.5rem;
}

details.slop-details .why-inner {
  font-size: 0.92rem;
  color: var(--text-muted);
  padding-left: 0.5rem;
  border-left: 2px solid var(--border);
}

/* What works */
.works-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.25rem;
}

.works-card {
  background: linear-gradient(165deg, var(--bg-card) 0%, var(--bg-elevated) 100%);
  border: 1px solid rgba(126, 231, 135, 0.25);
  border-radius: var(--radius);
  padding: 1.35rem;
}

.works-card h3 {
  margin: 0 0 0.5rem;
  font-size: 1.05rem;
  color: var(--accent);
}

.works-card p {
  margin: 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

/* Footer */
.site-footer {
  padding: 2.5rem 0 3rem;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 0.88rem;
}

.site-footer .domain {
  font-family: var(--font-mono);
  color: var(--accent);
}

.err-banner {
  display: none;
  background: rgba(255, 107, 157, 0.15);
  border: 1px solid var(--slop);
  color: var(--text);
  padding: 1rem;
  border-radius: var(--radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
}

.err-banner.visible {
  display: block;
}

@media (max-width: 600px) {
  .hero {
    padding-top: 2.5rem;
  }

  .nav-links {
    width: 100%;
    justify-content: center;
  }
}